N-Desmethyl Ivabradine hydrochloride is a key metabolite and a pharmacologically active intermediate of Ivabradine, a selective inhibitor of the cardiac pacemaker current (If) in the sinoatrial node. It is structurally characterized as the N-demethylated derivative of Ivabradine hydrochloride. This compound is primarily used in pharmaceutical research and development. It serves as a crucial reference standard for the quantification and pharmacokinetic profiling of Ivabradine metabolites during clinical studies and bioanalytical method validation. Its role is essential for understanding the drug's metabolism, efficacy, and safety profile. As a significant metabolite, it is also investigated for its own potential pharmacological activity. The synthesis and availability of high-purity N-Desmethyl Ivabradine hydrochloride are critical for ensuring the quality control of Ivabradine API and for supporting regulatory submissions related to this cardiovascular drug.